Possible.....I'll be getting remote start added next week.
My old HHR would always turn the fan on full blast but only for the vents, not defrost. It remembered hot or cold settings but not A/C or Defrost.
It may have a default setting. I assume you have turned the car off with the A/C running and when you remote start, the defrost vents start blowing instead of the A/C out of the vents correct? One would have to assume if it cannot remember the last settings then it'll always go to the default for the defrost vents...
I found it in my vehicle owner’s manual under the vehicle personalization section. You can set heated seats, front and rear defogger, and what speed you want the fan to start if you have it set to Auto.
On Infotainment screen try Settings/Vehicle then choose the option you want to adjust.
Hope this helps.